Sparkling "I'm a bit scared that during the joint counselling I am going to be pulled to shreds by the counsellor."
If the counsellor does this to you, stop the session, demand your money back and make a big fucking fuss. The counsellor is there to help you not tear you to shred, "I know I've done wrong and I'm trying to do anything I can to fix it." I actually think the biggest danger is you will tear yourself to shreds! I think you need some assertiveness training. This is not all your fault.
" I think he's worried that even if I miraculously fix my problems he will be left having changed so much about himself he won't be able to unravel all of that." I am still not convinced he had managed to change so much and you, who clearly love him, have not noticed!
"I guess he didn't realise how it would make him feel over time." Yet he stayed married and kept having children with you...
"He's not helped with the excessive drinking and not talking to me and telling me he's changing his actions all the time. " Indeed that is all part of the problem, not helpful to a close relationship!
" And all the hiding and secrecy has just made me get worse over time. He also was pretty desperate for me to stay at home with the kids and I think that's caused me to become more fixated on his life as I'm so down and bored. I've often said I want to go back but he hasn't been supportive of that. We do have other problems but I guess the main one for him is me and my jealousy."
He sounds like a fucking nightmare OP. Honestly, he sounds pretty abusive, he wants you at home, despite you being bored and unhappy! What do you see in him?
KarmaNoMore I don;t think the OP is making excuses for herself, quite the opposite. I think she is trying to claim all the blame.
Totally agree with IAmNoAngel "I think that the sooner you realise what a controlling selfish manchild he is, the better."
"For example he had some nude photos of an ex on his computer which he told me about but didn't want to delete. This made me very jealous. Is that normal or is that not? I feel like I just don't know anymore."
YES it is normal to feel jealous about this.
NO it is not normal to want to keep naked photos of an ex on his phone. He sounds like a massive knob. I think you will be better off without him, he sounds awful. (Honestly)
"I am just lonely and sad and feel like it's not helped me. So I often talk of going back to work and then he makes me feel bad and my own guilt then makes me feel like I don't want to. So it's not just him." Actually the more you say it sounds like totally him!
"You are right I do need to build a life for myself. I've made him too much the centre of the universe and that must be hard for him to live up to. I also need something in life for me." Actually, he has made himself the centre of your world. He encouraged you to have kids and stay at home despite your not wanting this.
"Is it not worth trying to fix it for our children if no one else Naze? " your choice, but I don't think it is wise to stay for your kids. How many more kids is he planning? How long is he going to control you and your not going back to work etc? Honestly, please stop thinking this is your fault.